As previous physicians have stated it is unwise to play with a torn mcl.
The mcl , medial collateral, ligament, is a stabilizer for the inner side of your knee. It also helps to protect the acl (anterior cruciate ligament) which if torn does require surgical repair. Healing of a completely torn mcl ligament may take from 6-12 weeks. Lesser injuries to the ligament may result in less play time loss.